package com.itheima.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.constant.MessageConstant;
import com.itheima.entity.Result;
import com.itheima.service.MemberService;
import com.itheima.service.ReportService;
import com.itheima.service.SetmealService;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * 统计报表
 */
@RestController
@RequestMapping("/report")
public class ReportController {

    @Reference
    private MemberService memberService;
    @Reference
    private SetmealService setmealService;
    @Reference
    private ReportService reportService;

    /**
     * 会员数量统计
     * @return
     */
    @RequestMapping("/getMemberReport")
    public Result getMemberReport(){

        Map<String, Object> map = new HashMap<>();
        List<String> months = new ArrayList<>();
        Calendar calendar = Calendar.getInstance();
        //计算过去一年的12个月
        calendar.add(Calendar.MONTH,-12);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy.MM");
        for (int i = 0;i<12;i++){
            calendar.add(Calendar.MONTH,1);
            Date time = calendar.getTime();
            months.add(simpleDateFormat.format(time));
        }
        map.put("months",months);

        List<Integer> memberCount = memberService.findMemberCountByMonth(months);
        map.put("memberCount",memberCount);
        return new Result(true, MessageConstant.GET_MEMBER_NUMBER_REPORT_SUCCESS,map);

    }

    /**
     * 预约套餐数据统计
     * @return
     */
    @RequestMapping("/getSetmealReport")
    public Result getSetmealReport(){
        try {
            //查询预约套餐名称集数量的集合
            List<Map<String, Object>> list = setmealService.findSetmealCount();

            //存放预约套餐的名称集合
            List<String> setmealNames = new ArrayList<>();
            for (Map<String, Object> m : list) {
                String name = (String) m.get("name");
                setmealNames.add(name);
            }

            //存放以上两个集合的map
            Map<String,Object> map = new HashMap<>();
            map.put("setmealCount",list);
            map.put("setmealNames",setmealNames);

            return new Result(true,MessageConstant.GET_SETMEAL_COUNT_REPORT_SUCCESS,map);
        }catch (Exception e){
            e.printStackTrace();
            return new Result(false,MessageConstant.GET_SETMEAL_COUNT_REPORT_FAIL);
        }
    }

    /**
     * 获取运营统计数据
     * @return
     */
    @RequestMapping("/getBusinessReportData")
    public Result getBusinessReportData(){
        try{
            Map<String,Object> data = reportService.getBusinessReport();
            return new Result(true,MessageConstant.GET_BUSINESS_REPORT_SUCCESS,data);
        }catch (Exception e){
            e.printStackTrace();
            return new Result(false,MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }


    /**
     * 导出运营数据
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("/exportBusinessReport")
    public Result exportBusinessReport(HttpServletRequest request, HttpServletResponse response){

        try{

            Map<String, Object> result = reportService.getBusinessReport();

            //取出返回结果数据，准备将报表数据写入到Excel文件中
            String reportDate = (String) result.get("reportDate");
            Integer todayNewMember = (Integer) result.get("todayNewMember");
            Integer totalMember = (Integer) result.get("totalMember");
            Integer thisWeekNewMember = (Integer) result.get("thisWeekNewMember");
            Integer thisMonthNewMember = (Integer) result.get("thisMonthNewMember");
            Integer todayOrderNumber = (Integer) result.get("todayOrderNumber");
            Integer thisWeekOrderNumber = (Integer) result.get("thisWeekOrderNumber");
            Integer thisMonthOrderNumber = (Integer) result.get("thisMonthOrderNumber");
            Integer todayVisitsNumber = (Integer) result.get("todayVisitsNumber");
            Integer thisWeekVisitsNumber = (Integer) result.get("thisWeekVisitsNumber");
            Integer thisMonthVisitsNumber = (Integer) result.get("thisMonthVisitsNumber");
            List<Map> hotSetmeal = (List<Map>) result.get("hotSetmeal");

            //模板excel文件路径
            String filePath = request.getSession().getServletContext().getRealPath("template")+ File.separator+"report_template.xlsx";

            //基于提供的Excel模板文件在内存中创建一个excel对象
            XSSFWorkbook excel = new XSSFWorkbook(new FileInputStream(filePath));
            //读取第一个工作表
            XSSFSheet sheet = excel.getSheetAt(0);

            //开始设置数据
            XSSFRow row = sheet.getRow(2);
            row.getCell(5).setCellValue(reportDate);//日期

            row = sheet.getRow(4);
            row.getCell(5).setCellValue(todayNewMember);//新增会员数（本日）
            row.getCell(7).setCellValue(totalMember);//总会员数

            row = sheet.getRow(5);
            row.getCell(5).setCellValue(thisWeekNewMember);//本周新增会员数
            row.getCell(7).setCellValue(thisMonthNewMember);//本月新增会员数

            row = sheet.getRow(7);
            row.getCell(5).setCellValue(todayOrderNumber);//今日预约数
            row.getCell(7).setCellValue(todayVisitsNumber);//今日到诊数

            row = sheet.getRow(8);
            row.getCell(5).setCellValue(thisWeekOrderNumber);//本周预约数
            row.getCell(7).setCellValue(thisWeekVisitsNumber);//本周到诊数

            row = sheet.getRow(9);
            row.getCell(5).setCellValue(thisMonthOrderNumber);//本月预约数
            row.getCell(7).setCellValue(thisMonthVisitsNumber);//本月到诊数

            int rowNum = 12;
            for(Map map : hotSetmeal){//热门套餐
                String name = (String) map.get("name");
                Long setmeal_count = (Long) map.get("setmeal_count");
                BigDecimal proportion = (BigDecimal) map.get("proportion");
                row = sheet.getRow(rowNum ++);
                row.getCell(4).setCellValue(name);//套餐名称
                row.getCell(5).setCellValue(setmeal_count);//预约数量
                row.getCell(6).setCellValue(proportion.doubleValue());//占比
            }

            //使用输出流将表格以附件的形式下载下来，浏览器作为客户端
            ServletOutputStream outputStream = response.getOutputStream();
            //代表是excel文件类型
            response.setContentType("application/Vnd.ms-excel");
            //指定以附件形式下载
            response.setHeader("content-Disposition","attachment;filename=report.xlsx");
            excel.write(outputStream);

            outputStream.flush();
            outputStream.close();
            excel.close();
            return null;

        }catch (Exception e){

            e.printStackTrace();
            return new Result(false,MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }
}
